The magnetic properties of a magnet are concentrated at:

If a magnet is suspended freely, it aligns itself with its north pole pointing towards:

Like poles ______ each other, while unlike poles ______ each other.

The region around a magnet where its effects can be felt is called its:

Which of the following is NOT correct about magnetic lines of force?

What happens when iron filings are sprinkled on a sheet placed over a bar magnet?

In which direction does the magnetic force act on a north pole placed in a magnetic field?

Which of the following is used to make permanent magnet?

What happens when the south pole of a magnet is brought near the north pole of another magnet?

Charge is a fundamental part of:

The SI unit of charge is the:

The two types of electric charge are:

A body is said to be electrically charged when:

The effects produced by charges at rest are studied under:

An electric current is defined as:

The SI unit of current is the:

The level of charge is described by a quantity called:

The SI unit of potential difference is the:

What is the relationship between potential difference and current?

The common potential difference or voltage of pencil and torch cells is:

Button cells, used in watches and cameras, create potential differences of:

Cells produce electrical energy from:

The outer casing of a common cell is made of:

The central rod in a common cell is made of:

In a common cell, the carbon rod acts as the:

A battery is:

The potential difference provided by the mains is:

Which of the following is NOT a common source of generating electricity on a large scale?

What does the '+' and '-' sign denote at the two ends of a cell?

An electric current can flow only along a:

An arrangement of devices through which electric current can flow is called a(n):

A device used for opening or closing an electric circuit is called a:

In a circuit diagram, the components are represented by:

In a circuit diagram, current flows from the ______ to the ______ terminal of the cell.

In a series connection, current flows through:

In a parallel connection, current can flow through:

Appliances in a house are typically connected in:

What is the advantage of connecting appliances in parallel?

What happens when the switch is 'turned on' in a circuit?

Materials that allow the passage of electricity are called:

Materials that do not allow the passage of electricity are called:

Which of the following is a good conductor of electricity?

Which of the following is an insulator?

Why are electrical wires usually covered with plastic?

Resistance is a physical quantity that measures:

The higher the resistance, the ______ the current under similar conditions.

Which of the following has the lowest resistance?

A component included in a circuit to introduce a certain amount of resistance is called a:

What is one of the uses of a resistor in a circuit?

A conductor behaves like a magnet when:

What happens to a compass needle when placed near a wire carrying a current?

Reversing the direction of the current in a wire will:

An electromagnet is commonly made of:

The strength of an electromagnet depends on:

What happens to an electromagnet when the current is switched off?

Which of the following is NOT a part of an electric bell?

In an electric bell, the hammer strikes the gong when:

Which of the following devices does NOT use electromagnets?

The phenomenon of a magnet inducing a current in a conductor is called:

What is one of the ways of inducing an emf in a conductor using a magnet?

Sound is produced by:

Vibration means the rapid ______ movement of an object.

What happens when a source of sound stops vibrating?

Which of the following is likely to produce sound?

What will you feel if you touch a speaker that is producing sound?

The organ that produces sound in humans is called the:

The larynx is also known as the:

Inside the larynx are two folds of tissue called:

Sound is produced when ______ passes through the larynx.

Sound is produced when ______ passes through the larynx.

A shrill sound is produced when the vocal cords are:

A bass sound is produced when the vocal cords are:

Why do women and children typically have shriller voices than men?

Which of the following modify the sound produced by the larynx into speech?

The loudness of a sound is also called its:

The loudness of a sound depends on:

A powerful source of sound, such as a loudspeaker, produces a ______ sound.

The maximum displacement of a vibrating body is called its:

The greater the amplitude of vibrations, the ______ the sound.

The sharpness or dullness of a sound is called its:

Shrill sounds have a ______ pitch.

Dull or heavy sounds have a ______ pitch.

On average, male voices have a ______ pitch than female voices.

The number of vibrations a source makes in one second is called its:

The unit of frequency is the:

If a source vibrates 500 times in 1 second, its frequency is:

A taut string vibrates with a ______ frequency than a loose string.

Shorter strings produce sounds of ______ pitch than longer strings.

Thin strings produce sounds of ______ pitch than thick strings.

The quality of a sound is also called its:

Quality describes the ______ nature of a sound.

Musical sounds generally have a ______ quality.

Noises, such as those from vehicles, generally have an ______ quality.

Quality also helps us identify the ______ of a sound.

The lowest frequency in a complex sound is called the:

The fundamental frequency determines the ______ of a sound.

Frequencies that are integral multiples of the fundamental frequency are called:

The fundamental frequency is also known as the:

Frequencies present along with the fundamental frequency are called:

Every source emits sounds with its own fixed pattern of:

Richer or more pleasant sounds have a ______ number of overtones.

When a drummer strikes a drum, the drum skin:

As the drum skin moves outwards, the air molecules around it get:

As the drum skin moves inwards, the air molecules around it:

Waves of compression and rarefaction are passed on through the:

Do the air molecules travel long distances with the sound wave?

The air molecules vibrate about their:

What causes the eardrum to vibrate?

The brain interprets the vibrations of the eardrum as:

In physics, a wave is a disturbance that travels through a:

In a wave, what is it that travels?

In a transverse wave, the vibrations are ______ to the direction of wave travel.

An example of a transverse wave is:

In a longitudinal wave, the vibrations are ______ to the direction of wave travel.

Sound waves are:

Sound cannot travel through a:

In the experiment with the electric bell in a jar, what happens when the air is pumped out?

The speed of sound in air is approximately:

Sound travels faster through:

The speed of sound in water is approximately:

The speed of sound in steel is approximately:

What is one of the things that affects the speed of sound in a medium?

Like light, sound can be:

Materials like thermocol, cotton, and wool are good ______ of sound.

Echoes are:

Echoes are:

For a clear echo to be heard, the echo must reach us at least ______ after the original sound.

The minimum distance of a reflecting surface for a clear echo to be heard is approximately:

Sonar is used to:

Light travels in a:

The speed of light is greatest in:

The speed of light in a vacuum is approximately:

Can anything in the universe travel faster than light?

We see most objects because they ______ light.

When light falls on an object, which of the following can happen?

An object appears transparent if most of the light falling on it:

Which surfaces are better reflectors of light?

Smooth surfaces, like mirrors, reflect light so well that they allow us to see:

When a parallel beam of light falls on a smooth surface, it remains ______ after reflection.

When a parallel beam of light falls on a rough surface, the reflected rays travel in ______ directions.

Reflection from a smooth surface is called:

Reflection from an uneven surface is called:

A narrow stream of light representing the path of light is called a:

How is a ray of light represented in diagrams?

What does the arrowhead on a light ray indicate?

How is a mirror represented in diagrams?

What is the layer at the back of a mirror called?

What is responsible for the reflection in a mirror?

A ray of light travelling towards a mirror is called the:

A ray of light travelling away from a mirror after reflection is called the:

A line drawn perpendicular to the reflecting surface at the point of incidence is called the:

The angle between the incident ray and the normal is called the:

The angle between the reflected ray and the normal is called the:

Which of the following lie in the same plane?

The angle of incidence is ______ the angle of reflection.

The image formed by a plane mirror appears to be ______ the mirror.

An image that cannot be formed on a screen is called a:

An image that can be formed on a screen is called a:

In a plane mirror, the image is as far behind the mirror as the object is:

The image formed by a plane mirror is of the ______ size as the object.

The image formed by a plane mirror is:

Which of the following is NOT a characteristic of an image formed by a plane mirror?

The image formed by a plane mirror is:

The distance of the image from the mirror is ______ the distance of the object from the mirror.

The interchange of left and right between an object and its image in a plane mirror is called:

Why is the word "AMBULANCE" often written laterally inverted on the front of ambulances?

Sunlight appears white but is a mixture of ______ colours.

Which of the following is NOT a component colour of white light?

How many colours of light can produce white light when mixed in equal proportion?

Colours that can be mixed to produce white light and all other colours are called:

Which of the following are considered the primary colours of light?

No two primary colours can be mixed to produce:

Red and green light mixed in equal proportion produce:

Green and blue light mixed in equal proportion produce:

Red and blue light mixed in equal proportion produce:

Colours produced by mixing two primary colours in equal proportion are called:

Which of the following are considered secondary colours of light?

Mixing lights of different colours to produce other colours is called:

Colour addition is used to produce images in:

The colour of an object depends on the colour of light it:

A rose appears red in white light because it reflects ______ light.

A leaf appears green in white light because it reflects ______ light.

The colour of an object can also be said to depend on the colour/s it ______ from white light.

A rose absorbs which components of white light?

A leaf absorbs which components of white light?

How would a red rose appear in green light?

How would a green leaf appear in red light?

Why does a blackboard appear black in white light?

Why does chalk appear white in white light?

If a sheet of paper absorbs only the blue component of white light, what colour will it appear?

If an object absorbs the green component of white light, what colour will it appear?

If an object absorbs the red component of white light, what colour will it appear?

Mixing colours in printing, dyeing, and painting is achieved through:

Yellow paint absorbs which component of white light?

Blue paint (more accurately cyan) absorbs which component of white light?